Improvement in sheer-rudders for booms



L. W". POND.

Sher-Rudders for Booms, 81c.

No.155i67. v Patented p -22,1874.

O\ inst LPI' .3

A c! C wifnsses: I W nventor: K" M THE GRAPHIC CO. PHOTO LITH.39& 4|PARK PLACE, N.Y

UNITED STATES PATENT QFFIGE.

LEVI W. POND, OF EAU CLAIRE, WISCONSIN, ASSIGNOR OF ONE-HALF HIS RIGHTTO EAU CLAIRE LUMBER COMPANY.

IMPROVEMENT IN SHEER-RUDDERS FOR BOOMS, 80c.

Specification forming part of Letters Patent Nol55,l67, dated September22, 1874; application filed January 22, 1874.

To all whom it may concern:

Be it known that I, LEVI W. POND, of Eau Claire, in the county of EauClaire and State of Wisconsin, have invented new and useful Improvementsin Sheer-Rudder Booms, of which the following is a full description,reference being had to the accompanying drawings, in which- Figure 1 isa plan View; Fig. 2, an end View, and Fig. 3, a detail.

This invention relates to that class of booms which are thrown across astream, held in position, and returned to the shore, by the action ofthe current only.

In the drawings, A represents one section of a boom, as many of which asmay be desired may be used, the same being properly connected one to theother. The upper end of the boom is to be secured to some stationaryobject, f, upon or near the shore, or upon a pier extending out into thestream. b b are arms or bars secured to the upper side of the boom. 0 care rudders hinged to the bars I) b. To the inner end of each rudder issecured a post, d, extending some distance above the top of the rudder.To the upper end of each post cl is secured a rope, e, by means of whichthe rudders are operated, which can be done by means of a winch placedat the lower end of the boom, or the rope can be passed through a sheaveat the lower end and carried to the upper end of the boom, as may bedesired.

To aid in opening the boom, and bring it to the bank, I place upon theouter ends of the rudders or upon a portion of them a secondary rudder,g, which will be out of the water when the boom is closed, and will bein the water when the boom is to be opened.

To the under side of the boom A I secure a projecting piece, h, toprevent logs from being carried under the boom.

In Fig. 1 the rudders 0 a are represented as out of the water, and therudder g as in the water. In Fig. 2 c is in the water and ,g is out ofit.

. In use, when it is desired to close the boom, the operator, by meansof the winch and rope e, brings the rudders c a into the position shownin Fig. 2-that is, down into the Water when the action of the currentupon these rudders will close the boom. When it is desired to open theboom, by releasing the rope e the action of the current and the weightof the posts 61 will bring the rudders c c to the surface, or entirelyout of the water, at the same time carrying the rudders 9 down into thewater, when the action of the current against the front of the boom, andagainst the rudders y, will open the boom, and after it has been broughtinto a line with the current, the current will continue to act upon thesecondary rudders g, and carry the boom around close to the shore.

The secondary rudders g are not absolutely essential, because the actionof the current, upon the boom will open it partially, bringing the boominto a line with the current without .the use of the secondary ruddersbut this is done more rapidly with than without them, and by their usethe boom can be brought closer to the shore, which in many cases isdesirable.

As represented, the rudders are hinged at their upper edge to the barsI) b, but they might be hinged at a point some distance below theirupper edges, and then that portion above their upper edges will aid incounterbalancing the rudders.

It is desirable to make the posts d, of such size and length that therudders can be held out of the water by them.

What I claim as new is as follows 1. The combination of the boom at,arms I) b, and rudders c c, all constructed substantially as and for thepurposes specified.

2. The boom a, provided with the lip h, when constructed and arrangedsubstantially as and for the purpose specified.

3. The secondary rudder g, in combination with the rudder 0, bar b, andboom a, substantially as and for the purpose specified.

LEVI W. POND.

Witnesses:

E. A. WEsT, O. W. Bonn.

